Foreman Maintain

Fixes #20945 - rubocop convention errors & warnings

Fixes #20898 - removed params from runtime_message in metadata.rb

Merge remote-tracking branch 'origin/master' into upgrade-workflow

Fixes #46 - isc dhcp configuration check

Merge remote-tracking branch 'origin/master' into upgrade-workflow

Add commands for executing procedures

Update from review

Support for run_once procedures and repositories setup

Configure repositories and update packages

Introduce run_strategy for scenarios

Health-check scenarios are better to run all steps regardless of errors
(:fail_slow strategy), while the migration scenarios should fail as soon
as first failure happens (:fail_fast strategy).

By default, the scenarios are treated as `:fail_fast`.

Full upgrade scenario

This commit intoroduces more structured upgrade scenario consisting of
this scenarios:

• pre_upgrade_check - non-modifying checks: is the system ready?
• pre_migrations - modifying procedures before source update
• migrations - source update and main migrations...

Define order using ruby TSort

1. Introduce 2 metadata: 'before' and 'after'
2. Current order is:
Checks::SyncPlans::WithEnabledStatus
Checks::DiskSpeedMinimal
Checks::SystemRegistration
Checks::ForemanTasks::NotPaused
Checks::ForemanTasks::NotRunning
Checks::ForemanTasks::Invalid::CheckOld...

Assumeyes option

Hammer setup preparation step

Support running commands interactively

Introduce required params

Install required packages as the first one

RFE #23 - Add new status [WARNING] - Check: is system self registered

Add tests for tasks paused check and additional procedures

Namespace checks and procedures

Let's organize the stuff a bit better

Turn hammer feature into a utils class

After looking more into this, I think the util class is actually better
fit for the hammer case. I've also removed the detection of the
credentials from hammer configuration, as we actually don't need
the credentials by our own.

Shellescaping and password filtering support in system helper

Support code for allowing filering out sensitive data from logs
+ properly escaping user-specified variables (such as password)

Fixes #5 - enhanced logger feature

1. Deleted existing lib/foreman_maintain/logger.rb files
2. Now, logs are stored into file under foreman-maintain/log directory in debug mode
3. Number of log files set to 10 i.e
when, there would be 11 files remaining, the oldest one will be deleted...

Run confine against classes, not objects

This allows us to have multiple objects of the same procedure in the
system, differing in the constructor parameters. Useful for parametrized
procedures.

Extract metadata DSL to separate namespace

Having the DSL methods directly on the classes caused issues when
needing to query the metadata later.

Fixes #1 - IO operations on disk and file system

1) Removed feature DiskIO(Check is sufficent)
2) rename Concerns::DiskUtility to Utils::Disk
3) Move disk_utlity_concerns logic to Check itself
4) confine hdparm and fio
5) Error log message - verbore and descriptive...

Add travis

Add scaffold for definitions tests

CLI basic structure

Update real definitions based on latest changes in lib

Refactor: make autodetect opt-out

Ability to define precedures

Unify finder and detector

The detector now can do both detection and filtering

Refactor

Rename feature_name to more generic label

Tests for runner and reporter

WIP: check scenarios

Ability to define and filter checks